Let function f(x)=x(2011+√(2013-x²)).Find maximum and minimum value of function f(x)?

A  group of boy and girl students  compete to eat pizza at super market .One pizza was cut 12 pieces one boy student  could to eat 6 or 7 pieces and one girl student could to eat 2 or 3 pieces .

If they put  4 pizzas they will not see enough  if  they put 5 pizzas will over .

How many boy and girl students who compete ?

Solve the equation sinx=1.5

Find the polynomial y=f(x) such that f(-6)=2400,f(-4)=432,f(-3)=120,f(-2)=16,f(-1)=0,f(0)=0,f(1)=-8,f(2)=0

If (abc‾) and (abcabcabc...abc‾)Ξ0(mod91).Find all non-negative integers (a,b,c)?